Cutting plate for dry-shaving apparatus



Dec. 25, 1951 P. F; M. SENDERS CUTTING PLATE FOR DRY-SHAVING APPARATUSFiled April 17. 1948 2 SHEETS-SHEET 1 INVENTOR. PIETEEHANSMMAEL SEVDEBDec. 25, 1951 Filed April 17, 1948 P. F. M- SENDERS CUTTING PLATE FORDRY-SHAVING APPARATUS a W I/m A B I Zi .14. M

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PLETERFRAMSMCJl/JHSEWERX AGENT.

Patented Dec. 25, 1951 UNITED STATES PATENT OFFICE "2,579,706 U'iJTlNGFLATE manger- APPARATUS Pieter Frans Michael Senders, Eindhoven,Netherlands, assignor to Hartford National Bank and Trust company,Hartford, 66%., as trustee Application April 17, 1948; S'i-ial No.21,733 Iii the Netherlands May 7, 1947 Cutting plates for dry-shavingapparatus are already known of the type comprising a number of lanes oftravel withrunning surfaces for reciprocating cutting members and havingshav; ing apertures preferably in the form of parallel slots. The lanes.of travel are all located in the same place so that the cutters may beapplied to the skin simultaneously and are thus capable of covering alarge area in one movement. The speed of shaving is considered increasedin that way.

In the known forms of construction the slotted apertures are provided inall lanes of travel in the same direction. Since it is known that themost satisfactory results in shaving are obtained if the cutting plateis moved over the skin in the same sense as the slots, theabove-mentioned cutting plates of known type are dependent on thedirection of movement with the consequence that, in order to obtainoptimum results, the user of the apparatus is always under the necessityof giving due consideration to the preferential direction in shaving.

The object of the invention is to overcome this disadvantage, at leastin part, and yet to profit of the known advantages afforded byconstruction comprising cutting plates which cooperate withreciprocating cutting members.

With this object in View, a cutting plate for a dry-shaving apparatus isprovided accordingto the invention, which comprises a number of lanes oftravel with running surfaces for reciprocating cutter members andshaving apertures preferably in form of parallel slots, wherein thelanes of travel are all located in the same plane, but are disposed inat least two difierent directions with respect to each other in such amanner that the angles between the center lines of the lanes are equalor substantially equal. I

Consequently, the angles between the center lines of the slots indifferent lanes of travel are preferably also equal or substantiallyequal. Since the lanes may thus form a regular figure, there are alreadytwo preferential directions provided when using lanes extending in onlytwo different directions. If, however, use is made of more than twodifferent directions, the number of preferential directions increasesaccordingly and the user of the shaving apparatus becomes more and moreindependent from the direction of the sweep.

Although it may seem more difiicult and more expensive to make such acutting plate, manufacture becomes in reality quite simple when use ismade of the electro-plating manufacturing meth- 0d as described in theprior patent application Ser. No. '7l9-,764-, now abandoned, whichmethod is particularly suitable for the purpose. v

The invention will now be explained more fully with reference to theaccompanying drawing, which shows by way of example, some fewconstructions of a cutting plate according to "said in vention and inwhich: i l

Figs. 1-6 are plan views showing diagrammatically a number ofembodiments of cutting plates with different lanes in which the cutterelements are guided to travel;

Fig. 7 a top plan view, with the central portion broken away, of afurther embodiment of a cutting plate according to the invention;

Fig. 8 is a cross section along line 8"-8 of Fig. 7;

Fig. 9 is a cross section along line 9-9 of Fig. 7;

Fig. 10 is a showing of another embodimentof the cutting plate;

Fig. ii is a cross section along line H ll of Fig. 10;

Fig. 12 is a perspective view of two cutters used with the cutting plateshown in Fig. 1;

Fig. 13 is a plan View of two double cutters used with the cutting plateshown in Fig. 2;

Fig. 14 is a cross section taken along line lh-ll of Fig. 13;

Fig. 15 is a perspective view or two of the cutter members used with thecutting plate shown in Fig. 4; and

Fig. 16 shows three cutter members to be used with the plate illustratedin Fig. 5.

In the following descriptive part of the specification, the expressionlanes will be used for lanes of travel of the cutter members.

Referring to Fig". l, the cutting plate shown in plan comprises twolanes l and 2, which form a cross. The angles between the center lines 3and 4 are in this case The direction of movement of the cutting members3|], 32 shown in Fig. 12 which move on a running surface provided bygrinding at the bottom side of each of the lanes, is indicated bydouble-headed arrows 5 and 8. The slot-shaped shaving apertures 1provided in the lanes are in this case at right angles to vthe centerlines of the lanes but may be, if desired, at a smaller angle therewith.The cutter mem'-- bers in this as well as in the embodiments describedhereinbelow with reference to Figs; 2-6, can be driven by mechanismexplained with reference to Fig. 8. I

Fig. 2 shows four lanes, I, I, 2', 2 forming a square. As before, thedirection of movement of the four cutting members 33, 34, 35, shown inFigs. 13 and 1 1 are indicated by the double-headed arrows. Members atand all are connected jt'qf an arm 50 for movement in unison; membersand 3B are similarly connected by an arm 52.

Fig. 3 shows a cutting plate of slightly different arrangement of lanesI", I", 2", 2" in a square.

In Fig. 4 the lanes are in similar configuration as in Fig. 3, buttheya're overlapping, i. e. each lane is interrupted at the pointat'which the other lane intersects with it at right angles. Fig. 15illustrates how the cutting members 39 and are arranged for intersectinglanes. Only two cutter members to be used in combination with a cuttingplate according to Fig. 4 have been shown so as to illustrate theposition of the cutters at the crossing of lanes; The complete cutterarrangement may be built similarly to the one shown in Fig. 13 withpairs of cutter members parallel to each other, with each cutteroverlapping another cutter as shown in Fig. 15. It should be noted thatFig. 15 is a perspective cross section of the cutter members.

1 Fig.5 is the-illustration of a cutting plate with three lanes arrangedin triangular forms. Fig. 16 shows the cutter arrangement therefor withthree cutters 44 each having a slot for engagement with a. pin 46.Acentral spindle ll is mounted for oscillating movement; for instance bymeans of a vibration motor to which the pins 46 are fixedly connected;Thus the oscillation of spindle 4.1 imparts a reciprocating motion tothe cutters 44 m a known manner.

Fig. 6 shows a cutter plate having three lanes radially arranged atangles of 120". Fig. '7 is a similar arrangement with six lanes. Thearrangement for both embodiments including the drive means is more fullydescribed with reference a cooperate with common cutting members 1,15, 1

16, each of which is driven by means of a pin l8 mounted eccentricallyon the rotary drivingspindle ll. For this purpose the central portion ofeach cuttingmember has s1ot-shaped apertures 19, as showniin Fig. 7. Inorder tomake this common drive possible, the parts of the cuttingmembers It to It coupled to the driving pin 18 have stepped centralportions which bridge one another in a crosswise manner as shown in Fig.8. By means of spring pins 29, the cutting members are urged in knownmanner on to the running surfaces provided at the inside of the lanes8tcl3.- .1.

Figures 10 and 11 show yet another embodiment of the cutter plate inwhich us'eis made of a free space in the central portion of the plate toobtain additional shaving action.

In a cross-shaped construction four lanes A, B, C, D are arranged asshown in Fig. 10. The central portion comprises four groups of parallelslots 2| at an angle with lanes A-D and issuing on the'one hand, at theouter edge 22 and merging, on the other hand into a central reentrantpart 23. Between'the slots 2| provision is made of small apertures 25 soas to ensure acombined shaving effect. 'The central portion comprises arotary cutting member 26 which is driven by means of a pin 2'!eccentrically mounted on spindle IS. The four cross-shaped cuttinglanes 1. In a dry shaving apparatus of the type comprising a shaver headmounted in a housing, cuttermembers"associated with said head and anoperating motor in said housing for driving the cutter members of saidshaver head in reciprocating movement, in combination a cutting platefor cooperation with said cutter members, said plate having shavingapertures in the form of parallel slots and comprising a plurality oflanes of travel forming running surfaces for said cutter members, saidlanes being all located in the same plane in at least two differentdirections with respect to each other in such a manner that v the anglesbetween the center lines of the lanes for cooperation with said cuttermembers, said plate having shaving apertures in the form of parallelslots and comprising a plurality of lanes of travel forming runningsurfaces for said cutter members, said lanes being all located in thesame plane in at least two different radial directions with respect toeach other in such a manner that the angles between the center lines ofthe lanes are substantially equal.

3. In a dry shaving apparatus of the type comprising a shaver headmounted in a housing, cutter members associated with said head and anoperating motor in said housing for driving the cutter members of saidshaver head in reciprocating movement, in combination a cutting platefor cooperation with said cutter members, said plate having shavingapertures in the form of parallel slots and comprising a plurality oflanes of travel forming running surfaces for said cutter members, saidlanes being all located in the same plane in at least two differentdirections with respect to each other in such a manner that the anglesbetween the center lines of the lanes are substantially equal, saidcutting plate having a central portion provided with shaving slots andwith a running surface, a cutter member adapted to be moved through saidrunning surface, and driving means for operating said outter memberalong said running surface.

4. In a dry shaving apparatus of the type comprising a shaver headmounted in a housing, cutter'members associated with said head, and anoperating motor in said housing for driving the cutter members of saidshaver head in reciprocating movement, in combination a cutting platefor cooperation with said cutter members, said plate having shavingapertures in the form of parallel slots and comprising a plurality oflanes of travel forming running surfaces for said cutter members, saidlanes being all located in the same plane in at least two difierentradial directions with respect to each other in such a manner that theangles between the center lines of the lanes are substantially equal,said cutting plate having a central portion provided with shaving slotsand with a running surface, a cutter member adapted to be moved throughsaid running surface, and driving means for op bers, said plate havingshaving apertures in the form of parallel slots and comprising aplurality of lanes of travel forming running surfaces for said cuttermembers, said lanes being all located in the same plane in at least twodifferent directions with respect to each other in such a manner thatthe angles between the center lines of the lanes are substantiallyequal, a common driving spindle for actuating said cutter members, saidcutter members having stepped portions arranged to bridge each other.

6. In a dry shaving apparatus of the type comprising a shaver headmounted in a housing, cutter members associated with said head, and anoperating motor in said housing for driving the cutter members of saidshaver head in reciprocating movement, in combination a cutting platefor cooperation with said cutter members, said plate having shavingapertures in the form of parallel slots and comprising a plurality of 202,350,805

lanes of travel forming running surfaces for said cutter members, saidlanes being all located in the same plane in at least two difierentradial directions with respect to each other in such a manner that theangles between the center lines of the lanes are substantially equal, acommon driving spindle for actuating said cutter members, said cuttermembers having stepped central portions arranged to bridge each otherand slots therein for receiving said driving spindle.

PIETER FRANS MICHAEL SENDERS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Name Date olving June 6, 1944 Number

